Publikation:
Aggregation of TiO2 and Ag nanoparticles in soil solution - Effects of primary nanoparticle size and dissolved organic matter characteristics

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dc.contributor.authorDegenkolb, Laura
dc.contributor.authorPeters, André
dc.contributor.authorEllerbrock, Ruth H.
dc.contributor.authorKlitzke, Sondra
dc.contributor.authorZehlike, Lisa
dc.date.accessioned2024-06-16T14:39:21Z
dc.date.available2024-06-16T14:39:21Z
dc.date.issued2019
dc.description.abstractThe colloidal stability of nanoparticles NP in soil solution is important to assess their potential effects on ecosystems. The aim of this work was to elucidate the interactions between initial particle size di, particle number concentration (N0) as well as the characteristics of dissolved organic matter (DOM) for stabilizing Ag NP and TiO2 NP. In batch experiments using time-resolved dynamic light scattering (DLS), we investigated the aggregation of TiO2 NP (79 nm, 164 nm) and citrate-stabilised Ag NP (73 nm, 180 nm) in Ca2+ solution (2 mM) and two soil solutions, one extracted from a farmland and one from a floodplain soil (each containing 2 mM Ca2+). Our results demonstrate that the initial particle size and the particle number concentration affected aggregation more strongly in the presence of DOM than without DOM. The composition of DOM also affected aggregate size: NP formed larger aggregates in the presence of hydrophilic DOM than in the presence of hydrophobic DOM. Hydrophilic DOM showed a larger charge density than hydrophobic DOM. If Ca2+ is present, it may bridge DOM molecules, which may lead to greater NP destabilization. The results demonstrate that DOM interaction with NP may not only vary for different DOM characteristics (i.e. charge density) but may also be influenced by the presence of multivalent cations and different NP material; thus the effect of DOM on NP colloidal stability is not uniform. © 2019 The Authors. Published by Elsevier B.V.en
dc.format.extent1 Onlineressource (Seiten 288-298)
dc.format.mediumonline resource
dc.identifier.doihttps://doi.org/10.60810/openumwelt-1081
dc.identifier.urihttps://openumwelt.de/handle/123456789/5172
dc.language.isoeng
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectAnzahlkonzentration
dc.titleAggregation of TiO2 and Ag nanoparticles in soil solution - Effects of primary nanoparticle size and dissolved organic matter characteristics
dc.typeWissenschaftlicher Artikel
dc.type.dcmitext
dc.type.mediumcomputer
dspace.entity.typePublication
local.bibliographicCitation.journalTitleThe Science of the Total Environment
local.bibliographicCitation.originalDOI10.1016/j.scitotenv.2019.06.020
local.bibliographicCitation.volume688 (2019)
local.collectionAufsätze
local.contributor.authorId02182550
local.contributor.authorId00412347
local.identifier.catalogId02467731
local.ingest.leader05130naa a2200000uu 4500
local.jointTitleAGGREGATION OF TIO2 AND AG NANOPARTICLES IN SOIL SOLUTION EFFECTS OF PRIMARY NANOPARTICLE SIZE AND DISSOLVED ORGANIC MATTER CHARACTERISTICS
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